Power-transmitter.



E STATES` NPATENT Carien.

Y GEORGE P. SMITH, OF JERSEYVILLE, ILLINOIS.-

POWER-TRANSMITTER SPECIFICATION forming part of Letters Patent No.656,380,`dated August 2d, 1900.

i Application led February 8, 1900. Serial No. 4,536. (Nomoidel.) i

in general, and more particularly to the mechanism for operating thedrum, although the principles involved may be adapted to thetransmission of power for any other purpose.

The object of the invention is to 'provide a construction andarrangement in which the energy applied to a lever will be converted torotary motion of high power to turn the winding-drum for lifting Weightsand in which, furthermore, `the lever mechanism may be thrown out ofoperation and the drum may be permitted to move in a reverse directionat whatever speed may be desired, modified by the energy applied to givethe drum its reverse movement.

In the drawingsforrning a portion of this specification, and in whichsimilar numerals of reference design ate like and corresponding parts inthe several Views, Figure 1 is a side elevation of a mechanism foroperating a winding-drum and including the frame in which the drum isjournaled. Fig. 2 is side elevation of Fig. 1, parts being shown insection to illustrate the adjustable journal-box for the shaft of thewinding-drum. a detail elevation showing the latches for holding theoperating-lever and its pawl in their inoperative positions. Fig. 4 is atransverse section of the brake-drum and illustrating the positions ofthe'brake-band'and brake-lever.

Referring now to the drawings, the mechanism of the present invention ismounted in' uprights 5 and 6, having a cross-beam 7, and

in these nprights 5 and 6 are formed transverse slots 8. In each slot orpassage 8 is disposed a bearing-block'9 of suitable metal, the

. height of this bearing-block being somewhat less than the height ofthe slot, while its Width is such as to fit snugly. 'In thesebearing-blocks 9 is journaled a drum-shaft 10, having a winding-drum 11mounted thereon, and when it is desired to raise the Windingdrum thespacingblocks 12 are forced between Fig. 3 is the bearing-blocks and thelower walls of the slots 8 to raise the blocks. When it is desired tolower the winding-drum, the spacingblocks 12 are inserted between theblocks 9 and the upper walls of the slots to hold the bearing-blocksagainst the lower walls of the slots, the object of this adjustment ofthe bearing-blocks being hereinafter explained.

In the upright 5 and at one side of the slot S thereof is fixed abearing-sleeve 13, in which is mounted a stub-shaft 14, having aninternal gear-Wheel 15 mounted thereon, this internal gear-wheel havingratchet-teeth upon its outer periphery, as illustrated at 16. The teethof the internal gear are adapted for engagement with a pinion 17,mounted upon the outer end of the shaft 10, the engagement of the pinionwith the gear being accomplished' by shifting the blocks 9 to theirproper positions by means of spacingblocks 12.

In order to rotate the gear-wheel 15, there is provided a lever 1S, oneend of which is bifurcated, the legs 19 and 20 thereof being disposed tostraddle the internal gear-wheel and having the extremities thereofmounted upon the shaft 14. Between the legs of the lever 1S is mounted apawl 21, against which impinges a spring 22, carried by the lever, thisspring acting to hold the pawl normally in engagement with theratchet-teeth 16. Thus it will be seen that if the lever 18 be operatedin one direction it will correspondingly rotate the wheel V15, and ifoperated in an opposite :direction the pawl Will ride freely over theratchetteeth,this movement of the gear-wheel ljbeing communicatedto theWinding-drum l 11, through the medium'of the pinion 17 and shaft 10.

In the raising and lowering of weights it is of courselnecessary thatsome means be providedfor permitting vthe return movement of thewinding-drum at a proper speed,

and for this purpose a brake-drum 23 is .formed upbn 'one end of theWinding-drum,

and with this brake-drum is engaged a brakeband 24, one extremity ofwhich is attached `to a plate 25 upon the cross-beam 7, while theopposite end of the band is connected with a lever 26, fnlcruined at itsextremity upon the plate 25 at the opposite side of the beam 7. Thus ifthe lever 26 be operated in IOC one direction the brake-band 24 will bemoved against the brake-drum, with the effect of increasing theresistance to the rotation of the drum, While by operating the lever in.an opposite direction the drum will be permitted -to rotate freely. Toprevent return movement of the brake-drum as the lever 18 is raised fora second stroke, a pawl 29 is pivoted to the upright 5 in a position toengage the teeth of the ratchet in the same direction as pawl 2l. Thispawl 29 is a gravity-actuated'pawl and may be raised from its engagingposition againstthe action ot' gravity, as illustrated in Fig. 3 of thedrawings. When the brake-drum is permitted to rotate in the directionopposite to that given by the lever 18, it is of course necessary thatthe pawls 2l and 29 be held from engagement withl the ratchet-teeth 16,and for this purpose the pawl 21 has a rear arc-shaped extension 27,which is adapted to engage the face of a cam 28, carried by the pawl 29upon the upright 5. This engagement of the extension with the cani actsto raise the pawl from engagement with the ratchet-teeth. To maintainthe lever in this position with the pawl raised, a spring-latch 30k isfixed to the upright 5 and has its downturned end 31 disposed to snapover a pin 32 upon the lever 18. When it is desired to rotate the drum1l at a lesser speed, the blocks 12 may be removed from beneath theblocks 9 to move the shaft 10 to engage the pinion 17 with a gear 15upon the hub'of the gear l5, the blocks 12 then being placed above theblocks 9 to hold the pinion in proper position with respect to the hubof the gear. With this decrease in speed there is a correspondingincrease in power.

What is claimed is- 1. The combination with a ratchet, of abodily-movable pawl for engagementwith the ratchet to operate it, saidpawl having an engaging portion, and a second pawl disposed forengagement with the ratchet to hold it from return movement, the secondpawl having an engaging portion forengagement by the engaging portionot' the first pawl to move both pawls from the ratchet.

2. The combination with a ratchet, of a pawl-carrying device, a pawlupon the carrying device and adapted to engage the ratchet, a cam in thepath of movement of the pawl in one direction for enga-gement thereby tomove the pawl from engagement with the ratchet, and a latch forengagement by the pawl-carrier to hold the carrier With the pawl in enjgagement with the cam.

3. The combination with a drum-shaft, of a winding-drum mounted thereonand provided With a brake-drum, a pinion upon the drum-shaft, aninternal gear engaged with the pinion and having a ratchet, a pivoteddrum-shaft, an internal gear engaged with the pinion and provided with aratchet, a

fr pivoted lever having a pawl for cooperation i with the ratchet, saidpawl having an extension, a cam adapted for engagement by the extensionof the pawl to move the pawl from engagement with the ratchet, a latchfor en- I gageinent by the lever to hold it with the pawl in engagementWith the cam, and a brake engaged with the brake-drum.

5. The combination with uprights having slots, of bearing-blocks withinthe slots and adapted for adjustment, wedges for holding the blocks atdierent points of their adjustment, a drum-shaft mounted in the blocks`and provided with a pinion, a stub-shaft mounted adjacent the rst-namedshaft, an internal gear-Wheel mounted upon the stubshaft, a gear uponthe hub of the internal gear and adapted to receive the pinion of thedru m-shaft interchangeably with the internal gear, a ratchet carried bythe internal gear, and a pivoted lever provided with a pawl forengagement with the ratchet to rotate the internal gear.

6. The combination with a ratchet-wheel, of a lever, a pawl carried bythe lever for engagement with the ratchet, said pawl having anextension, and a second pawl disposed for engagement with the ratchet,said Vsecond pawl having a portion disposed for engagement by theextension of the tirst pawl to disengage both pawls from the ratchetwhen the lever is moved to the limit of its motion in one direction.

7. The combination with a ratchet-Wheel of a pivoted lever, aspring-pressed pawl pivoted to the lever-for engagement with the ratchetsaid pawl having an extension, a second pawl pivoted for engagement withthe ratchet and lying in the path of movement of the extension of thefirst pawl when 'the lever is moved in one direction to disengage bothpawls from the ratchet, and a brake mechanism operatively connectedwith. the

ratchet.

In testimony that I claim the foregoing as IOO `IIo

my own I have hereto affixed my signaturer in the presence of twowitnesses.

GEORGE P. SMITH. Witnesses:

PAUL M. HAMILTON, F. J. LAURENT.

